Terry Gross, host of National Public Radio's "Fresh Air" interview with Dr. Fred Volkmar on Asperger's Syndrome.

Volkmar is a leading researcher in Asperger's Syndrome, generally considered to be a form of autism characterized by deficits in social interaction and non-verbal communication. In the early 1990s, Volkmar led the team that helped develop the definition of autism used by the American Psychiatric Assoc. He is the Irving B. Harris Professor of Child Psychiatry, Pediatrics and Psychology at the Yale University Child Study Center.